[Dovecot] Is it possible to palce "detailed" (with local+folder@domai.com) messages not to INBOX/folder, but to INBOX/FixedSubfolder/folder?

Hello, Dovecot.

Now, with enabled "recipient_delimiter = +", "lmtp_save_to_detail_mailbox" and using LMTP, messages with "detail" in address, are placed in auto-created mailboxes. It is great, but what if I want to put all such mailboxes not in inbox directly, but lower in mailbox hierarchy? Is it possible without using sieve?

-- // Black Lion AKA Lev Serebryakov lev@serebryakov.spb.ru